src/emacs.c

   1 /* Fully extensible Emacs, running on Unix, intended for GNU.
   2    Copyright (C) 1985,86,87,93,94,95,97,1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include <signal.h>
  23 #include <errno.h>
  24
  25 #include <config.h>
  26 #include <stdio.h>
  27
  28 #include <sys/types.h>
  29 #include <sys/file.h>
  30
  31 #ifdef VMS
  32 #include <ssdef.h>
  33 #endif
  34
  35 #ifdef BSD_SYSTEM
  36 #include <sys/ioctl.h>
  37 #endif
  38
  39 #include "lisp.h"
  40 #include "commands.h"
  41 #include "intervals.h"
  42 #include "buffer.h"
  43
  44 #include "systty.h"
  45 #include "blockinput.h"
  46 #include "syssignal.h"
  47 #include "process.h"
  48 #include "keyboard.h"
  49
  50 #ifdef HAVE_SETRLIMIT
  51 #include <sys/time.h>
  52 #include <sys/resource.h>
  53 #endif
  54
  55 #ifndef O_RDWR
  56 #define O_RDWR 2
  57 #endif
  58
  59 extern void malloc_warning ();
  60 extern void set_time_zone_rule ();
  61 extern char *index ();
  62 extern char *strerror ();
  63
  64 /* Command line args from shell, as list of strings */
  65 Lisp_Object Vcommand_line_args;
  66
  67 /* The name under which Emacs was invoked, with any leading directory
  68    names discarded.  */
  69 Lisp_Object Vinvocation_name;
  70
  71 /* The directory name from which Emacs was invoked.  */
  72 Lisp_Object Vinvocation_directory;
  73
  74 /* The directory name in which to find subdirs such as lisp and etc.
  75    nil means get them only from PATH_LOADSEARCH.  */
  76 Lisp_Object Vinstallation_directory;
  77
  78 /* Hook run by `kill-emacs' before it does really anything.  */
  79 Lisp_Object Vkill_emacs_hook;
  80
  81 #ifdef SIGUSR1
  82 /* Hooks for signal USR1 and USR2 handing */
  83 Lisp_Object Vsignal_USR1_hook;
  84 #ifdef SIGUSR2
  85 Lisp_Object Vsignal_USR2_hook;
  86 #endif
  87 #endif
  88
  89 /* Search path separator.  */
  90 Lisp_Object Vpath_separator;
  91
  92 /* Set nonzero after Emacs has started up the first time.
  93   Prevents reinitialization of the Lisp world and keymaps
  94   on subsequent starts.  */
  95 int initialized;
  96
  97 #ifdef DOUG_LEA_MALLOC
  98 /* Preserves a pointer to the memory allocated that copies that
  99    static data inside glibc's malloc.  */
 100 void *malloc_state_ptr;
 101 /* From glibc, a routine that returns a copy of the malloc internal state.  */
 102 extern void *malloc_get_state ();
 103 /* From glibc, a routine that overwrites the malloc internal state.  */
 104 extern void malloc_set_state ();
 105 #endif
 106
 107 /* Variable whose value is symbol giving operating system type.  */
 108 Lisp_Object Vsystem_type;
 109
 110 /* Variable whose value is string giving configuration built for.  */
 111 Lisp_Object Vsystem_configuration;
 112
 113 /* Variable whose value is string giving configuration options,
 114    for use when reporting bugs.  */
 115 Lisp_Object Vsystem_configuration_options;
 116
 117 Lisp_Object Qfile_name_handler_alist;
 118
 119 /* If non-zero, emacs should not attempt to use an window-specific code,
 120    but instead should use the virtual terminal under which it was started */
 121 int inhibit_window_system;
 122
 123 /* If nonzero, set Emacs to run at this priority.  This is also used
 124    in child_setup and sys_suspend to make sure subshells run at normal
 125    priority; Those functions have their own extern declaration.  */
 126 int emacs_priority;
 127
 128 /* If non-zero a filter or a sentinel is running.  Tested to save the match
 129    data on the first attempt to change it inside asynchronous code. */
 130 int running_asynch_code;
 131
 132 #ifdef BSD_PGRPS
 133 /* See sysdep.c.  */
 134 extern int inherited_pgroup;
 135 #endif
 136
 137 #ifdef HAVE_X_WINDOWS
 138 /* If non-zero, -d was specified, meaning we're using some window system. */
 139 int display_arg;
 140 #endif
 141
 142 /* An address near the bottom of the stack.
 143    Tells GC how to save a copy of the stack.  */
 144 char *stack_bottom;
 145
 146 #ifdef HAVE_WINDOW_SYSTEM
 147 extern Lisp_Object Vwindow_system;
 148 #endif /* HAVE_WINDOW_SYSTEM */
 149
 150 extern Lisp_Object Vauto_save_list_file_name;
 151
 152 #ifdef USG_SHARED_LIBRARIES
 153 /* If nonzero, this is the place to put the end of the writable segment
 154    at startup.  */
 155
 156 unsigned int bss_end = 0;
 157 #endif
 158
 159 /* Nonzero means running Emacs without interactive terminal.  */
 160
 161 int noninteractive;
 162
 163 /* Value of Lisp variable `noninteractive'.
 164    Normally same as C variable `noninteractive'
 165    but nothing terrible happens if user sets this one.  */
 166
 167 int noninteractive1;
 168
 169 /* Save argv and argc.  */
 170 char **initial_argv;
 171 int initial_argc;
 172
 173 static void sort_args ();
 174 void syms_of_emacs ();
 175 \f
 176 /* Signal code for the fatal signal that was received */
 177 int fatal_error_code;
 178
 179 /* Nonzero if handling a fatal error already */
 180 int fatal_error_in_progress;
 181
 182 #ifdef SIGUSR1
 183 int SIGUSR1_in_progress=0;
 184 SIGTYPE
 185 handle_USR1_signal (sig)
 186      int sig;
 187 {
 188   if (! SIGUSR1_in_progress)
 189     {
 190       SIGUSR1_in_progress = 1;
 191
 192       if (!NILP (Vrun_hooks) && !noninteractive)
 193         call1 (Vrun_hooks, intern ("signal-USR1-hook"));
 194
 195       SIGUSR1_in_progress = 0;
 196     }
 197 }
 198
 199 #ifdef SIGUSR2
 200 int SIGUSR2_in_progress=0;
 201 SIGTYPE
 202 handle_USR2_signal (sig)
 203      int sig;
 204 {
 205   if (! SIGUSR2_in_progress)
 206     {
 207       SIGUSR2_in_progress = 1;
 208
 209       if (!NILP (Vrun_hooks) && !noninteractive)
 210         call1 (Vrun_hooks, intern ("signal-USR2-hook"));
 211
 212       SIGUSR2_in_progress = 0;
 213     }
 214 }
 215 #endif
 216 #endif
 217
 218 /* Handle bus errors, illegal instruction, etc. */
 219 SIGTYPE
 220 fatal_error_signal (sig)
 221      int sig;
 222 {
 223   fatal_error_code = sig;
 224   signal (sig, SIG_DFL);
 225
 226   TOTALLY_UNBLOCK_INPUT;
 227
 228   /* If fatal error occurs in code below, avoid infinite recursion.  */
 229   if (! fatal_error_in_progress)
 230     {
 231       fatal_error_in_progress = 1;
 232
 233       shut_down_emacs (sig, 0, Qnil);
 234     }
 235
 236 #ifdef VMS
 237   LIB$STOP (SS$_ABORT);
 238 #else
 239   /* Signal the same code; this time it will really be fatal.
 240      Remember that since we're in a signal handler, the signal we're
 241      going to send is probably blocked, so we have to unblock it if we
 242      want to really receive it.  */
 243 #ifndef MSDOS
 244   sigunblock (sigmask (fatal_error_code));
 245 #endif
 246   kill (getpid (), fatal_error_code);
 247 #endif /* not VMS */
 248 }
 249
 250 #ifdef SIGDANGER
 251
 252 /* Handler for SIGDANGER.  */
 253 SIGTYPE
 254 memory_warning_signal (sig)
 255      int sig;
 256 {
 257   signal (sig, memory_warning_signal);
 258
 259   malloc_warning ("Operating system warns that virtual memory is running low.\n");
 260
 261   /* It might be unsafe to call do_auto_save now.  */
 262   force_auto_save_soon ();
 263 }
 264 #endif
 265
 266 /* We define abort, rather than using it from the library,
 267    so that GDB can return from a breakpoint here.
 268    MSDOS has its own definition on msdos.c  */
 269
 270 #if ! defined (DOS_NT) && ! defined (NO_ABORT)
 271 void
 272 abort ()
 273 {
 274   kill (getpid (), SIGABRT);
 275   /* This shouldn't be executed, but it prevents a warning.  */
 276   exit (1);
 277 }
 278 #endif
 279
 280 \f
 281 /* Code for dealing with Lisp access to the Unix command line */
 282
 283 static void
 284 init_cmdargs (argc, argv, skip_args)
 285      int argc;
 286      char **argv;
 287      int skip_args;
 288 {
 289   register int i;
 290   Lisp_Object name, dir, tem;
 291   int count = specpdl_ptr - specpdl;
 292   Lisp_Object raw_name;
 293
 294   initial_argv = argv;
 295   initial_argc = argc;
 296
 297   raw_name = build_string (argv[0]);
 298
 299   /* Add /: to the front of the name
 300      if it would otherwise be treated as magic.  */
 301   tem = Ffind_file_name_handler (raw_name, Qt);
 302   if (! NILP (tem))
 303     raw_name = concat2 (build_string ("/:"), raw_name);
 304
 305   Vinvocation_name = Ffile_name_nondirectory (raw_name);
 306   Vinvocation_directory = Ffile_name_directory (raw_name);
 307
 308   /* If we got no directory in argv[0], search PATH to find where
 309      Emacs actually came from.  */
 310   if (NILP (Vinvocation_directory))
 311     {
 312       Lisp_Object found;
 313       int yes = openp (Vexec_path, Vinvocation_name,
 314                        EXEC_SUFFIXES, &found, 1);
 315       if (yes == 1)
 316         {
 317           /* Add /: to the front of the name
 318              if it would otherwise be treated as magic.  */
 319           tem = Ffind_file_name_handler (found, Qt);
 320           if (! NILP (tem))
 321             found = concat2 (build_string ("/:"), found);
 322           Vinvocation_directory = Ffile_name_directory (found);
 323         }
 324     }
 325
 326   if (!NILP (Vinvocation_directory)
 327       && NILP (Ffile_name_absolute_p (Vinvocation_directory)))
 328     /* Emacs was started with relative path, like ./emacs.
 329        Make it absolute.  */
 330     Vinvocation_directory = Fexpand_file_name (Vinvocation_directory, Qnil);
 331
 332   Vinstallation_directory = Qnil;
 333
 334   if (!NILP (Vinvocation_directory))
 335     {
 336       dir = Vinvocation_directory;
 337       name = Fexpand_file_name (Vinvocation_name, dir);
 338       while (1)
 339         {
 340           Lisp_Object tem, lib_src_exists;
 341           Lisp_Object etc_exists, info_exists;
 342
 343           /* See if dir contains subdirs for use by Emacs.
 344              Check for the ones that would exist in a build directory,
 345              not including lisp and info.  */
 346           tem = Fexpand_file_name (build_string ("lib-src"), dir);
 347           lib_src_exists = Ffile_exists_p (tem);
 348
 349 #ifdef MSDOS
 350           /* MSDOS installations frequently remove lib-src, but we still
 351              must set installation-directory, or else info won't find
 352              its files (it uses the value of installation-directory).  */
 353           tem = Fexpand_file_name (build_string ("info"), dir);
 354           info_exists = Ffile_exists_p (tem);
 355 #else
 356           info_exists = Qnil;
 357 #endif
 358
 359           if (!NILP (lib_src_exists) || !NILP (info_exists))
 360             {
 361               tem = Fexpand_file_name (build_string ("etc"), dir);
 362               etc_exists = Ffile_exists_p (tem);
 363               if (!NILP (etc_exists))
 364                 {
 365                   Vinstallation_directory
 366                     = Ffile_name_as_directory (dir);
 367                   break;
 368                 }
 369             }
 370
 371           /* See if dir's parent contains those subdirs.  */
 372           tem = Fexpand_file_name (build_string ("../lib-src"), dir);
 373           lib_src_exists = Ffile_exists_p (tem);
 374
 375
 376 #ifdef MSDOS
 377           /* See the MSDOS commentary above.  */
 378           tem = Fexpand_file_name (build_string ("../info"), dir);
 379           info_exists = Ffile_exists_p (tem);
 380 #else
 381           info_exists = Qnil;
 382 #endif
 383
 384           if (!NILP (lib_src_exists) || !NILP (info_exists))
 385             {
 386               tem = Fexpand_file_name (build_string ("../etc"), dir);
 387               etc_exists = Ffile_exists_p (tem);
 388               if (!NILP (etc_exists))
 389                 {
 390                   tem = Fexpand_file_name (build_string (".."), dir);
 391                   Vinstallation_directory
 392                     = Ffile_name_as_directory (tem);
 393                   break;
 394                 }
 395             }
 396
 397           /* If the Emacs executable is actually a link,
 398              next try the dir that the link points into.  */
 399           tem = Ffile_symlink_p (name);
 400           if (!NILP (tem))
 401             {
 402               name = Fexpand_file_name (tem, dir);
 403               dir = Ffile_name_directory (name);
 404             }
 405           else
 406             break;
 407         }
 408     }
 409
 410   Vcommand_line_args = Qnil;
 411
 412   for (i = argc - 1; i >= 0; i--)
 413     {
 414       if (i == 0 || i > skip_args)
 415         Vcommand_line_args
 416           = Fcons (build_string (argv[i]), Vcommand_line_args);
 417     }
 418
 419   unbind_to (count, Qnil);
 420 }
 421
 422 DEFUN ("invocation-name", Finvocation_name, Sinvocation_name, 0, 0, 0,
 423   "Return the program name that was used to run Emacs.\n\
 424 Any directory names are omitted.")
 425   ()
 426 {
 427   return Fcopy_sequence (Vinvocation_name);
 428 }
 429
 430 DEFUN ("invocation-directory", Finvocation_directory, Sinvocation_directory,
 431   0, 0, 0,
 432   "Return the directory name in which the Emacs executable was located")
 433   ()
 434 {
 435   return Fcopy_sequence (Vinvocation_directory);
 436 }
 437
 438 \f
 439 #ifdef VMS
 440 #ifdef LINK_CRTL_SHARE
 441 #ifdef SHARABLE_LIB_BUG
 442 extern noshare char **environ;
 443 #endif /* SHARABLE_LIB_BUG */
 444 #endif /* LINK_CRTL_SHARE */
 445 #endif /* VMS */
 446
 447 #ifdef HAVE_TZSET
 448 /* A valid but unlikely value for the TZ environment value.
 449    It is OK (though a bit slower) if the user actually chooses this value.  */
 450 static char dump_tz[] = "UtC0";
 451 #endif
 452
 453 #ifndef ORDINARY_LINK
 454 /* We don't include crtbegin.o and crtend.o in the link,
 455    so these functions and variables might be missed.
 456    Provide dummy definitions to avoid error.
 457    (We don't have any real constructors or destructors.)  */
 458 #ifdef __GNUC__
 459 #ifndef GCC_CTORS_IN_LIBC
 460 void __do_global_ctors ()
 461 {}
 462 void __do_global_ctors_aux ()
 463 {}
 464 void __do_global_dtors ()
 465 {}
 466 /* Linux has a bug in its library; avoid an error.  */
 467 #ifndef LINUX
 468 char * __CTOR_LIST__[2] = { (char *) (-1), 0 };
 469 #endif
 470 char * __DTOR_LIST__[2] = { (char *) (-1), 0 };
 471 #endif /* GCC_CTORS_IN_LIBC */
 472 void __main ()
 473 {}
 474 #endif /* __GNUC__ */
 475 #endif /* ORDINARY_LINK */
 476
 477 /* Test whether the next argument in ARGV matches SSTR or a prefix of
 478    LSTR (at least MINLEN characters).  If so, then if VALPTR is non-null
 479    (the argument is supposed to have a value) store in *VALPTR either
 480    the next argument or the portion of this one after the equal sign.
 481    ARGV is read starting at position *SKIPPTR; this index is advanced
 482    by the number of arguments used.
 483
 484    Too bad we can't just use getopt for all of this, but we don't have
 485    enough information to do it right.  */
 486
 487 static int
 488 argmatch (argv, argc, sstr, lstr, minlen, valptr, skipptr)
 489      char **argv;
 490      int argc;
 491      char *sstr;
 492      char *lstr;
 493      int minlen;
 494      char **valptr;
 495      int *skipptr;
 496 {
 497   char *p;
 498   int arglen;
 499   char *arg;
 500
 501   /* Don't access argv[argc]; give up in advance.  */
 502   if (argc <= *skipptr + 1)
 503     return 0;
 504
 505   arg = argv[*skipptr+1];
 506   if (arg == NULL)
 507     return 0;
 508   if (strcmp (arg, sstr) == 0)
 509     {
 510       if (valptr != NULL)
 511         {
 512           *valptr = argv[*skipptr+2];
 513           *skipptr += 2;
 514         }
 515       else
 516         *skipptr += 1;
 517       return 1;
 518     }
 519   arglen = (valptr != NULL && (p = index (arg, '=')) != NULL
 520             ? p - arg : strlen (arg));
 521   if (lstr == 0 || arglen < minlen || strncmp (arg, lstr, arglen) != 0)
 522     return 0;
 523   else if (valptr == NULL)
 524     {
 525       *skipptr += 1;
 526       return 1;
 527     }
 528   else if (p != NULL)
 529     {
 530       *valptr = p+1;
 531       *skipptr += 1;
 532       return 1;
 533     }
 534   else if (argv[*skipptr+2] != NULL)
 535     {
 536       *valptr = argv[*skipptr+2];
 537       *skipptr += 2;
 538       return 1;
 539     }
 540   else
 541     {
 542       return 0;
 543     }
 544 }
 545
 546 /* ARGSUSED */
 547 int
 548 main (argc, argv, envp)
 549      int argc;
 550      char **argv;
 551      char **envp;
 552 {
 553   char stack_bottom_variable;
 554   int skip_args = 0;
 555   extern int errno;
 556   extern int sys_nerr;
 557 #ifdef HAVE_SETRLIMIT
 558   struct rlimit rlim;
 559 #endif
 560   int no_loadup = 0;
 561
 562 #ifdef LINUX_SBRK_BUG
 563   __sbrk (1);
 564 #endif
 565
 566 #ifdef DOUG_LEA_MALLOC
 567   if (initialized)
 568     {
 569       extern void r_alloc_reinit ();
 570       malloc_set_state (malloc_state_ptr);
 571       free (malloc_state_ptr);
 572       r_alloc_reinit ();
 573     }
 574 #endif
 575
 576 #ifdef RUN_TIME_REMAP
 577   if (initialized)
 578     run_time_remap (argv[0]);
 579 #endif
 580
 581   sort_args (argc, argv);
 582   argc = 0;
 583   while (argv[argc]) argc++;
 584
 585   if (argmatch (argv, argc, "-version", "--version", 3, NULL, &skip_args)
 586       /* We don't know the version number unless this is a dumped Emacs.
 587          So ignore --version otherwise.  */
 588       && initialized)
 589     {
 590       Lisp_Object tem;
 591       tem = Fsymbol_value (intern ("emacs-version"));
 592       if (!STRINGP (tem))
 593         {
 594           fprintf (stderr, "Invalid value of `emacs-version'\n");
 595           exit (1);
 596         }
 597       else
 598         {
 599           printf ("GNU Emacs %s\n", XSTRING (tem)->data);
 600           printf ("Copyright (C) 1998 Free Software Foundation, Inc.\n");
 601           printf ("GNU Emacs comes with ABSOLUTELY NO WARRANTY.\n");
 602           printf ("You may redistribute copies of Emacs\n");
 603           printf ("under the terms of the GNU General Public License.\n");
 604           printf ("For more information about these matters, ");
 605           printf ("see the file named COPYING.\n");
 606           exit (0);
 607         }
 608     }
 609
 610 /* Map in shared memory, if we are using that.  */
 611 #ifdef HAVE_SHM
 612   if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args))
 613     {
 614       map_in_data (0);
 615       /* The shared memory was just restored, which clobbered this.  */
 616       skip_args = 1;
 617     }
 618   else
 619     {
 620       map_in_data (1);
 621       /* The shared memory was just restored, which clobbered this.  */
 622       skip_args = 0;
 623     }
 624 #endif
 625
 626 #ifdef NeXT
 627   {
 628     extern int malloc_cookie;
 629     /* This helps out unexnext.c.  */
 630     if (initialized)
 631       if (malloc_jumpstart (malloc_cookie) != 0)
 632         printf ("malloc jumpstart failed!\n");
 633   }
 634 #endif /* NeXT */
 635
 636 #ifdef VMS
 637   /* If -map specified, map the data file in */
 638   {
 639     char *file;
 640     if (argmatch (argv, argc, "-map", "--map-data", 3, &mapin_file, &skip_args))
 641       mapin_data (file);
 642   }
 643
 644 #ifdef LINK_CRTL_SHARE
 645 #ifdef SHARABLE_LIB_BUG
 646   /* Bletcherous shared libraries! */
 647   if (!stdin)
 648     stdin = fdopen (0, "r");
 649   if (!stdout)
 650     stdout = fdopen (1, "w");
 651   if (!stderr)
 652     stderr = fdopen (2, "w");
 653   if (!environ)
 654     environ = envp;
 655 #endif /* SHARABLE_LIB_BUG */
 656 #endif /* LINK_CRTL_SHARE */
 657 #endif /* VMS */
 658
 659 #if defined (HAVE_SETRLIMIT) && defined (RLIMIT_STACK)
 660   /* Extend the stack space available.
 661      Don't do that if dumping, since some systems (e.g. DJGPP)
 662      might define a smaller stack limit at that time.  */
 663   if (1
 664 #ifndef CANNOT_DUMP
 665       && (!noninteractive || initialized)
 666 #endif
 667       && !getrlimit (RLIMIT_STACK, &rlim))
 668     {
 669       long newlim;
 670       extern int re_max_failures;
 671       /* Approximate the amount regex.c needs per unit of re_max_failures.  */
 672       int ratio = 20 * sizeof (char *);
 673       /* Then add 33% to cover the size of the smaller stacks that regex.c
 674          successively allocates and discards, on its way to the maximum.  */
 675       ratio += ratio / 3;
 676       /* Add in some extra to cover
 677          what we're likely to use for other reasons.  */
 678       newlim = re_max_failures * ratio + 200000;
 679 #ifdef __NetBSD__
 680       /* NetBSD (at least NetBSD 1.2G and former) has a bug in its
 681        stack allocation routine for new process that the allocation
 682        fails if stack limit is not on page boundary.  So, round up the
 683        new limit to page boundary.  */
 684       newlim = (newlim + getpagesize () - 1) / getpagesize () * getpagesize();
 685 #endif
 686       if (newlim > rlim.rlim_max)
 687         {
 688           newlim = rlim.rlim_max;
 689           /* Don't let regex.c overflow the stack we have.  */
 690           re_max_failures = (newlim - 200000) / ratio;
 691         }
 692       if (rlim.rlim_cur < newlim)
 693         rlim.rlim_cur = newlim;
 694
 695       setrlimit (RLIMIT_STACK, &rlim);
 696     }
 697 #endif /* HAVE_SETRLIMIT and RLIMIT_STACK */
 698
 699   /* Record (approximately) where the stack begins.  */
 700   stack_bottom = &stack_bottom_variable;
 701
 702 #ifdef USG_SHARED_LIBRARIES
 703   if (bss_end)
 704     brk ((void *)bss_end);
 705 #endif
 706
 707   clearerr (stdin);
 708
 709 #ifndef SYSTEM_MALLOC
 710   if (! initialized)
 711     {
 712       /* Arrange to get warning messages as memory fills up.  */
 713       memory_warnings (0, malloc_warning);
 714
 715       /* Arrange to disable interrupt input while malloc and friends are
 716          running.  */
 717       uninterrupt_malloc ();
 718     }
 719 #endif  /* not SYSTEM_MALLOC */
 720
 721 #ifdef MSDOS
 722   /* We do all file input/output as binary files.  When we need to translate
 723      newlines, we do that manually.  */
 724   _fmode = O_BINARY;
 725
 726 #if __DJGPP__ >= 2
 727   if (!isatty (fileno (stdin)))
 728     setmode (fileno (stdin), O_BINARY);
 729   if (!isatty (fileno (stdout)))
 730     {
 731       fflush (stdout);
 732       setmode (fileno (stdout), O_BINARY);
 733     }
 734 #else  /* not __DJGPP__ >= 2 */
 735   (stdin)->_flag &= ~_IOTEXT;
 736   (stdout)->_flag &= ~_IOTEXT;
 737   (stderr)->_flag &= ~_IOTEXT;
 738 #endif /* not __DJGPP__ >= 2 */
 739 #endif /* MSDOS */
 740
 741 #ifdef SET_EMACS_PRIORITY
 742   if (emacs_priority)
 743     nice (emacs_priority);
 744   setuid (getuid ());
 745 #endif /* SET_EMACS_PRIORITY */
 746
 747 #ifdef EXTRA_INITIALIZE
 748   EXTRA_INITIALIZE;
 749 #endif
 750
 751   inhibit_window_system = 0;
 752
 753   /* Handle the -t switch, which specifies filename to use as terminal */
 754   while (1)
 755     {
 756       char *term;
 757       if (argmatch (argv, argc, "-t", "--terminal", 4, &term, &skip_args))
 758         {
 759           int result;
 760           close (0);
 761           close (1);
 762           result = open (term, O_RDWR, 2 );
 763           if (result < 0)
 764             {
 765               char *errstring = strerror (errno);
 766               fprintf (stderr, "emacs: %s: %s\n", term, errstring);
 767               exit (1);
 768             }
 769           dup (0);
 770           if (! isatty (0))
 771             {
 772               fprintf (stderr, "emacs: %s: not a tty\n", term);
 773               exit (1);
 774             }
 775           fprintf (stderr, "Using %s\n", term);
 776 #ifdef HAVE_WINDOW_SYSTEM
 777           inhibit_window_system = 1; /* -t => -nw */
 778 #endif
 779         }
 780       else
 781         break;
 782     }
 783
 784   if (argmatch (argv, argc, "-nw", "--no-windows", 6, NULL, &skip_args))
 785     inhibit_window_system = 1;
 786
 787   /* Handle the -batch switch, which means don't do interactive display.  */
 788   noninteractive = 0;
 789   if (argmatch (argv, argc, "-batch", "--batch", 5, NULL, &skip_args))
 790     noninteractive = 1;
 791
 792   /* Handle the --help option, which gives a usage message..  */
 793   if (argmatch (argv, argc, "-help", "--help", 3, NULL, &skip_args))
 794     {
 795       printf ("\
 796 Usage: %s [--batch]  [-t term] [--terminal term]\n\
 797       [-d display] [--display display]  [-nw] [--no-windows]\n\
 798       [-q] [--no-init-file]  [-u user] [--user user]  [--debug-init]\n\
 799       [--unibyte] [--multibyte] [--version] [--no-site-file]\n\
 800       [-f func] [--funcall func]  [-l file] [--load file]  [--eval expr]\n\
 801       [--insert file] [+linenum] file-to-visit  [--kill]\n\
 802 Report bugs to bug-gnu-emacs@gnu.org.  First, please see\n\
 803 the Bugs section of the Emacs manual or the file BUGS.\n", argv[0]);
 804       exit (0);
 805     }
 806
 807   if (! noninteractive)
 808     {
 809 #ifdef BSD_PGRPS
 810       if (initialized)
 811         {
 812           inherited_pgroup = EMACS_GETPGRP (0);
 813           setpgrp (0, getpid ());
 814         }
 815 #else
 816 #if defined (USG5) && defined (INTERRUPT_INPUT)
 817       setpgrp ();
 818 #endif
 819 #endif
 820     }
 821
 822 #ifdef POSIX_SIGNALS
 823   init_signals ();
 824 #endif
 825
 826   /* Don't catch SIGHUP if dumping.  */
 827   if (1
 828 #ifndef CANNOT_DUMP
 829       && initialized
 830 #endif
 831       )
 832     {
 833       sigblock (sigmask (SIGHUP));
 834       /* In --batch mode, don't catch SIGHUP if already ignored.
 835          That makes nohup work.  */
 836       if (! noninteractive
 837           || signal (SIGHUP, SIG_IGN) != SIG_IGN)
 838         signal (SIGHUP, fatal_error_signal);
 839       sigunblock (sigmask (SIGHUP));
 840     }
 841
 842   if (
 843 #ifndef CANNOT_DUMP
 844       ! noninteractive || initialized
 845 #else
 846       1
 847 #endif
 848       )
 849     {
 850       /* Don't catch these signals in batch mode if dumping.
 851          On some machines, this sets static data that would make
 852          signal fail to work right when the dumped Emacs is run.  */
 853       signal (SIGQUIT, fatal_error_signal);
 854       signal (SIGILL, fatal_error_signal);
 855       signal (SIGTRAP, fatal_error_signal);
 856 #ifdef SIGUSR1
 857       signal (SIGUSR1, handle_USR1_signal);
 858 #ifdef SIGUSR2
 859       signal (SIGUSR2, handle_USR2_signal);
 860 #endif
 861 #endif
 862 #ifdef SIGABRT
 863       signal (SIGABRT, fatal_error_signal);
 864 #endif
 865 #ifdef SIGHWE
 866       signal (SIGHWE, fatal_error_signal);
 867 #endif
 868 #ifdef SIGPRE
 869       signal (SIGPRE, fatal_error_signal);
 870 #endif
 871 #ifdef SIGORE
 872       signal (SIGORE, fatal_error_signal);
 873 #endif
 874 #ifdef SIGUME
 875       signal (SIGUME, fatal_error_signal);
 876 #endif
 877 #ifdef SIGDLK
 878       signal (SIGDLK, fatal_error_signal);
 879 #endif
 880 #ifdef SIGCPULIM
 881       signal (SIGCPULIM, fatal_error_signal);
 882 #endif
 883 #ifdef SIGIOT
 884       /* This is missing on some systems - OS/2, for example.  */
 885       signal (SIGIOT, fatal_error_signal);
 886 #endif
 887 #ifdef SIGEMT
 888       signal (SIGEMT, fatal_error_signal);
 889 #endif
 890       signal (SIGFPE, fatal_error_signal);
 891 #ifdef SIGBUS
 892       signal (SIGBUS, fatal_error_signal);
 893 #endif
 894       signal (SIGSEGV, fatal_error_signal);
 895 #ifdef SIGSYS
 896       signal (SIGSYS, fatal_error_signal);
 897 #endif
 898       signal (SIGTERM, fatal_error_signal);
 899 #ifdef SIGXCPU
 900       signal (SIGXCPU, fatal_error_signal);
 901 #endif
 902 #ifdef SIGXFSZ
 903       signal (SIGXFSZ, fatal_error_signal);
 904 #endif /* SIGXFSZ */
 905
 906 #ifdef SIGDANGER
 907       /* This just means available memory is getting low.  */
 908       signal (SIGDANGER, memory_warning_signal);
 909 #endif
 910
 911 #ifdef AIX
 912 /* 20 is SIGCHLD, 21 is SIGTTIN, 22 is SIGTTOU.  */
 913       signal (SIGXCPU, fatal_error_signal);
 914 #ifndef _I386
 915       signal (SIGIOINT, fatal_error_signal);
 916 #endif
 917       signal (SIGGRANT, fatal_error_signal);
 918       signal (SIGRETRACT, fatal_error_signal);
 919       signal (SIGSOUND, fatal_error_signal);
 920       signal (SIGMSG, fatal_error_signal);
 921 #endif /* AIX */
 922     }
 923
 924   noninteractive1 = noninteractive;
 925
 926 /* Perform basic initializations (not merely interning symbols) */
 927
 928   if (!initialized)
 929     {
 930       init_alloc_once ();
 931       init_obarray ();
 932       init_eval_once ();
 933       init_charset_once ();
 934       init_coding_once ();
 935       init_syntax_once ();      /* Create standard syntax table.  */
 936       init_category_once ();    /* Create standard category table.  */
 937                       /* Must be done before init_buffer */
 938       init_casetab_once ();
 939       init_buffer_once ();      /* Create buffer table and some buffers */
 940       init_minibuf_once ();     /* Create list of minibuffers */
 941                               /* Must precede init_window_once */
 942       init_window_once ();      /* Init the window system */
 943       init_fileio_once ();      /* Must precede any path manipulation.  */
 944     }
 945
 946   init_alloc ();
 947   init_eval ();
 948   init_coding ();
 949   init_data ();
 950   running_asynch_code = 0;
 951
 952   /* Handle --unibyte and the EMACS_UNIBYTE envvar,
 953      but not while dumping.  */
 954   if (
 955 #ifndef CANNOT_DUMP
 956       ! noninteractive || initialized
 957 #else
 958       1
 959 #endif
 960       )
 961     {
 962       int inhibit_unibyte = 0;
 963
 964       /* --multibyte overrides EMACS_UNIBYTE.  */
 965       if (argmatch (argv, argc, "-no-unibyte", "--no-unibyte", 4, NULL, &skip_args)
 966           || argmatch (argv, argc, "-multibyte", "--multibyte", 4, NULL, &skip_args))
 967         inhibit_unibyte = 1;
 968
 969       /* --unibyte requests that we set up to do everything with single-byte
 970          buffers and strings.  We need to handle this before calling
 971          init_lread, init_editfns and other places that generate Lisp strings
 972          from text in the environment.  */
 973       if (argmatch (argv, argc, "-unibyte", "--unibyte", 4, NULL, &skip_args)
 974           || argmatch (argv, argc, "-no-multibyte", "--no-multibyte", 4, NULL, &skip_args)
 975           || (getenv ("EMACS_UNIBYTE") && !inhibit_unibyte))
 976         {
 977           Lisp_Object old_log_max;
 978           Lisp_Object symbol, tail;
 979
 980           symbol = intern ("default-enable-multibyte-characters");
 981           Fset (symbol, Qnil);
 982
 983           if (initialized)
 984             {
 985               /* Erase pre-dump messages in *Messages* now so no abort.  */
 986               old_log_max = Vmessage_log_max;
 987               XSETFASTINT (Vmessage_log_max, 0);
 988               message_dolog ("", 0, 1, 0);
 989               Vmessage_log_max = old_log_max;
 990             }
 991
 992           for (tail = Vbuffer_alist; CONSP (tail);
 993                tail = XCONS (tail)->cdr)
 994             {
 995               Lisp_Object buffer;
 996
 997               buffer = Fcdr (XCONS (tail)->car);
 998               /* Verify that all buffers are empty now, as they
 999                  ought to be.  */
1000               if (BUF_Z (XBUFFER (buffer)) > BUF_BEG (XBUFFER (buffer)))
1001                 abort ();
1002               /* It is safe to do this crudely in an empty buffer.  */
1003               XBUFFER (buffer)->enable_multibyte_characters = Qnil;
1004             }
1005         }
1006     }
1007
1008   no_loadup
1009     = !argmatch (argv, argc, "-nl", "--no-loadup", 6, NULL, &skip_args);
1010
1011
1012 #ifdef HAVE_X_WINDOWS
1013   /* Stupid kludge to catch command-line display spec.  We can't
1014      handle this argument entirely in window system dependent code
1015      because we don't even know which window system dependent code
1016      to run until we've recognized this argument.  */
1017   {
1018     char *displayname = 0;
1019     int i;
1020     int count_before = skip_args;
1021
1022     /* Skip any number of -d options, but only use the last one.  */
1023     while (1)
1024       {
1025         int count_before_this = skip_args;
1026
1027         if (argmatch (argv, argc, "-d", "--display", 3, &displayname, &skip_args))
1028           display_arg = 1;
1029         else if (argmatch (argv, argc, "-display", 0, 3, &displayname, &skip_args))
1030           display_arg = 1;
1031         else
1032           break;
1033
1034         count_before = count_before_this;
1035       }
1036
1037     /* If we have the form --display=NAME,
1038        convert it into  -d name.
1039        This requires inserting a new element into argv.  */
1040     if (displayname != 0 && skip_args - count_before == 1)
1041       {
1042         char **new = (char **) xmalloc (sizeof (char *) * (argc + 2));
1043         int j;
1044
1045         for (j = 0; j < count_before + 1; j++)
1046           new[j] = argv[j];
1047         new[count_before + 1] = "-d";
1048         new[count_before + 2] = displayname;
1049         for (j = count_before + 2; j <argc; j++)
1050           new[j + 1] = argv[j];
1051         argv = new;
1052         argc++;
1053       }
1054     /* Change --display to -d, when its arg is separate.  */
1055     else if (displayname != 0 && skip_args > count_before
1056              && argv[count_before + 1][1] == '-')
1057       argv[count_before + 1] = "-d";
1058
1059     /* Don't actually discard this arg.  */
1060     skip_args = count_before;
1061   }
1062 #endif
1063
1064   /* argmatch must not be used after here,
1065      except when bulding temacs
1066      because the -d argument has not been skipped in skip_args.  */
1067
1068 #ifdef MSDOS
1069   /* Call early 'cause init_environment needs it.  */
1070   init_dosfns ();
1071   /* Set defaults for several environment variables.  */
1072   if (initialized)
1073     init_environment (argc, argv, skip_args);
1074   else
1075     tzset ();
1076 #endif /* MSDOS */
1077
1078 #ifdef WINDOWSNT
1079   /* Initialize environment from registry settings.  */
1080   init_environment ();
1081   init_ntproc ();       /* must precede init_editfns */
1082 #endif
1083
1084   /* egetenv is a pretty low-level facility, which may get called in
1085      many circumstances; it seems flimsy to put off initializing it
1086      until calling init_callproc.  */
1087   set_process_environment ();
1088   /* AIX crashes are reported in system versions 3.2.3 and 3.2.4
1089      if this is not done.  Do it after set_process_environment so that we
1090      don't pollute Vprocess_environment.  */
1091 #ifdef AIX
1092   putenv ("LANG=C");
1093 #endif
1094
1095   init_buffer ();       /* Init default directory of main buffer */
1096
1097   init_callproc_1 ();   /* Must precede init_cmdargs and init_sys_modes.  */
1098   init_cmdargs (argc, argv, skip_args); /* Must precede init_lread.  */
1099
1100   if (initialized)
1101     {
1102       /* Erase any pre-dump messages in the message log, to avoid confusion */
1103       Lisp_Object old_log_max;
1104       old_log_max = Vmessage_log_max;
1105       XSETFASTINT (Vmessage_log_max, 0);
1106       message_dolog ("", 0, 1, 0);
1107       Vmessage_log_max = old_log_max;
1108     }
1109
1110   init_callproc ();     /* Must follow init_cmdargs but not init_sys_modes.  */
1111   init_lread ();
1112
1113   /* Intern the names of all standard functions and variables;
1114      define standard keys.  */
1115
1116   if (!initialized)
1117     {
1118       /* The basic levels of Lisp must come first */
1119       /* And data must come first of all
1120          for the sake of symbols like error-message */
1121       syms_of_data ();
1122       syms_of_alloc ();
1123       syms_of_lread ();
1124       syms_of_print ();
1125       syms_of_eval ();
1126       syms_of_fns ();
1127       syms_of_floatfns ();
1128
1129       syms_of_abbrev ();
1130       syms_of_buffer ();
1131       syms_of_bytecode ();
1132       syms_of_callint ();
1133       syms_of_casefiddle ();
1134       syms_of_casetab ();
1135       syms_of_callproc ();
1136       syms_of_category ();
1137       syms_of_ccl ();
1138       syms_of_charset ();
1139       syms_of_cmds ();
1140 #ifndef NO_DIR_LIBRARY
1141       syms_of_dired ();
1142 #endif /* not NO_DIR_LIBRARY */
1143       syms_of_display ();
1144       syms_of_doc ();
1145       syms_of_editfns ();
1146       syms_of_emacs ();
1147       syms_of_fileio ();
1148       syms_of_coding ();        /* This should be after syms_of_fileio.  */
1149 #ifdef CLASH_DETECTION
1150       syms_of_filelock ();
1151 #endif /* CLASH_DETECTION */
1152       syms_of_indent ();
1153       syms_of_insdel ();
1154       syms_of_keyboard ();
1155       syms_of_keymap ();
1156       syms_of_macros ();
1157       syms_of_marker ();
1158       syms_of_minibuf ();
1159       syms_of_mocklisp ();
1160       syms_of_process ();
1161       syms_of_search ();
1162       syms_of_frame ();
1163       syms_of_syntax ();
1164       syms_of_term ();
1165       syms_of_undo ();
1166
1167       /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
1168       syms_of_textprop ();
1169 #ifdef VMS
1170       syms_of_vmsproc ();
1171 #endif /* VMS */
1172 #ifdef WINDOWSNT
1173       syms_of_ntproc ();
1174 #endif /* WINDOWSNT */
1175       syms_of_window ();
1176       syms_of_xdisp ();
1177 #ifdef HAVE_X_WINDOWS
1178       syms_of_xterm ();
1179       syms_of_xfns ();
1180       syms_of_fontset ();
1181 #ifdef HAVE_X11
1182       syms_of_xselect ();
1183 #endif
1184 #endif /* HAVE_X_WINDOWS */
1185
1186 #ifndef HAVE_NTGUI
1187       syms_of_xfaces ();
1188       syms_of_xmenu ();
1189 #endif
1190
1191 #ifdef HAVE_NTGUI
1192       syms_of_w32term ();
1193       syms_of_w32fns ();
1194       syms_of_w32faces ();
1195       syms_of_w32select ();
1196       syms_of_w32menu ();
1197       syms_of_fontset ();
1198 #endif /* HAVE_NTGUI */
1199
1200 #ifdef SYMS_SYSTEM
1201       SYMS_SYSTEM;
1202 #endif
1203
1204 #ifdef SYMS_MACHINE
1205       SYMS_MACHINE;
1206 #endif
1207
1208       keys_of_casefiddle ();
1209       keys_of_cmds ();
1210       keys_of_buffer ();
1211       keys_of_keyboard ();
1212       keys_of_keymap ();
1213       keys_of_macros ();
1214       keys_of_minibuf ();
1215       keys_of_window ();
1216       keys_of_frame ();
1217     }
1218
1219   if (!noninteractive)
1220     {
1221 #ifdef VMS
1222       init_vms_input ();/* init_display calls get_frame_size, that needs this */
1223 #endif /* VMS */
1224       init_display ();  /* Determine terminal type.  init_sys_modes uses results */
1225     }
1226   init_keyboard ();     /* This too must precede init_sys_modes */
1227 #ifdef VMS
1228   init_vmsproc ();      /* And this too. */
1229 #endif /* VMS */
1230   init_sys_modes ();    /* Init system terminal modes (RAW or CBREAK, etc.) */
1231   init_xdisp ();
1232   init_macros ();
1233   init_editfns ();
1234 #ifdef LISP_FLOAT_TYPE
1235   init_floatfns ();
1236 #endif
1237 #ifdef VMS
1238   init_vmsfns ();
1239 #endif /* VMS */
1240   init_process ();
1241
1242   if (!initialized)
1243     {
1244       char *file;
1245       /* Handle -l loadup, args passed by Makefile. */
1246       if (argmatch (argv, argc, "-l", "--load", 3, &file, &skip_args))
1247         Vtop_level = Fcons (intern ("load"),
1248                             Fcons (build_string (file), Qnil));
1249 #ifdef CANNOT_DUMP
1250       /* Unless next switch is -nl, load "loadup.el" first thing.  */
1251       if (! no_loadup)
1252         Vtop_level = Fcons (intern ("load"),
1253                             Fcons (build_string ("loadup.el"), Qnil));
1254 #endif /* CANNOT_DUMP */
1255     }
1256
1257   if (initialized)
1258     {
1259 #ifdef HAVE_TZSET
1260       {
1261         /* If the execution TZ happens to be the same as the dump TZ,
1262            change it to some other value and then change it back,
1263            to force the underlying implementation to reload the TZ info.
1264            This is needed on implementations that load TZ info from files,
1265            since the TZ file contents may differ between dump and execution.  */
1266         char *tz = getenv ("TZ");
1267         if (tz && !strcmp (tz, dump_tz))
1268           {
1269             ++*tz;
1270             tzset ();
1271             --*tz;
1272           }
1273       }
1274 #endif
1275     }
1276
1277   /* Gerd Moellmann <gerd@acm.org> says this makes profiling work on
1278      FreeBSD.  It might work on some other systems too.
1279      Give it a try and tell me if it works on your system.  */
1280 #ifdef __FreeBSD__
1281 #ifdef PROFILING
1282   if (initialized)
1283     {
1284       extern void _mcleanup ();
1285       extern char etext;
1286       extern Lisp_Object Fredraw_frame ();
1287       atexit (_mcleanup);
1288       /* This uses Fredraw_frame because that function
1289          comes first in the Emacs executable.
1290          It might be better to use something that gives
1291          the start of the text segment, but start_of_text
1292          is not defined on all systems now.  */
1293       monstartup (Fredraw_frame, &etext);
1294     }
1295   else
1296     moncontrol (0);
1297 #endif
1298 #endif
1299
1300   initialized = 1;
1301
1302 #ifdef LOCALTIME_CACHE
1303   /* Some versions of localtime have a bug.  They cache the value of the time
1304      zone rather than looking it up every time.  Since localtime() is
1305      called to bolt the undumping time into the undumped emacs, this
1306      results in localtime ignoring the TZ environment variable.
1307      This flushes the new TZ value into localtime. */
1308   tzset ();
1309 #endif /* defined (LOCALTIME_CACHE) */
1310
1311   /* Enter editor command loop.  This never returns.  */
1312   Frecursive_edit ();
1313   /* NOTREACHED */
1314 }
1315 \f
1316 /* Sort the args so we can find the most important ones
1317    at the beginning of argv.  */
1318
1319 /* First, here's a table of all the standard options.  */
1320
1321 struct standard_args
1322 {
1323   char *name;
1324   char *longname;
1325   int priority;
1326   int nargs;
1327 };
1328
1329 struct standard_args standard_args[] =
1330 {
1331   { "-version", "--version", 150, 0 },
1332 #ifdef HAVE_SHM
1333   { "-nl", "--no-shared-memory", 140, 0 },
1334 #endif
1335 #ifdef VMS
1336   { "-map", "--map-data", 130, 0 },
1337 #endif
1338   { "-t", "--terminal", 120, 1 },
1339   { "-nw", "--no-windows", 110, 0 },
1340   { "-batch", "--batch", 100, 0 },
1341   { "-help", "--help", 90, 0 },
1342   { "-no-unibyte", "--no-unibyte", 83, 0 },
1343   { "-multibyte", "--multibyte", 82, 0 },
1344   { "-unibyte", "--unibyte", 81, 0 },
1345   { "-no-multibyte", "--no-multibyte", 80, 0 },
1346 #ifdef CANNOT_DUMP
1347   { "-nl", "--no-loadup", 70, 0 },
1348 #endif
1349   /* -d must come last before the options handled in startup.el.  */
1350   { "-d", "--display", 60, 1 },
1351   { "-display", 0, 60, 1 },
1352   /* Now for the options handled in startup.el.  */
1353   { "-q", "--no-init-file", 50, 0 },
1354   { "-no-init-file", 0, 50, 0 },
1355   { "-no-site-file", "--no-site-file", 40, 0 },
1356   { "-u", "--user", 30, 1 },
1357   { "-user", 0, 30, 1 },
1358   { "-debug-init", "--debug-init", 20, 0 },
1359   { "-i", "--icon-type", 15, 0 },
1360   { "-itype", 0, 15, 0 },
1361   { "-iconic", "--iconic", 15, 0 },
1362   { "-bg", "--background-color", 10, 1 },
1363   { "-background", 0, 10, 1 },
1364   { "-fg", "--foreground-color", 10, 1 },
1365   { "-foreground", 0, 10, 1 },
1366   { "-bd", "--border-color", 10, 1 },
1367   { "-bw", "--border-width", 10, 1 },
1368   { "-ib", "--internal-border", 10, 1 },
1369   { "-ms", "--mouse-color", 10, 1 },
1370   { "-cr", "--cursor-color", 10, 1 },
1371   { "-fn", "--font", 10, 1 },
1372   { "-font", 0, 10, 1 },
1373   { "-g", "--geometry", 10, 1 },
1374   { "-geometry", 0, 10, 1 },
1375   { "-T", "--title", 10, 1 },
1376   { "-title", 0, 10, 1 },
1377   { "-name", "--name", 10, 1 },
1378   { "-xrm", "--xrm", 10, 1 },
1379   { "-r", "--reverse-video", 5, 0 },
1380   { "-rv", 0, 5, 0 },
1381   { "-reverse", 0, 5, 0 },
1382   { "-hb", "--horizontal-scroll-bars", 5, 0 },
1383   { "-vb", "--vertical-scroll-bars", 5, 0 },
1384   /* These have the same priority as ordinary file name args,
1385      so they are not reordered with respect to those.  */
1386   { "-L", "--directory", 0, 1 },
1387   { "-directory", 0, 0, 1 },
1388   { "-l", "--load", 0, 1 },
1389   { "-load", 0, 0, 1 },
1390   { "-f", "--funcall", 0, 1 },
1391   { "-funcall", 0, 0, 1 },
1392   { "-eval", "--eval", 0, 1 },
1393   { "-find-file", "--find-file", 0, 1 },
1394   { "-visit", "--visit", 0, 1 },
1395   { "-insert", "--insert", 0, 1 },
1396   /* This should be processed after ordinary file name args and the like.  */
1397   { "-kill", "--kill", -10, 0 },
1398 };
1399
1400 /* Reorder the elements of ARGV (assumed to have ARGC elements)
1401    so that the highest priority ones come first.
1402    Do not change the order of elements of equal priority.
1403    If an option takes an argument, keep it and its argument together.
1404
1405    If an option that takes no argument appears more
1406    than once, eliminate all but one copy of it.  */
1407
1408 static void
1409 sort_args (argc, argv)
1410      int argc;
1411      char **argv;
1412 {
1413   char **new = (char **) xmalloc (sizeof (char *) * argc);
1414   /* For each element of argv,
1415      the corresponding element of options is:
1416      0 for an option that takes no arguments,
1417      1 for an option that takes one argument, etc.
1418      -1 for an ordinary non-option argument.  */
1419   int *options = (int *) xmalloc (sizeof (int) * argc);
1420   int *priority = (int *) xmalloc (sizeof (int) * argc);
1421   int to = 1;
1422   int incoming_used = 1;
1423   int from;
1424   int i;
1425   int end_of_options = argc;
1426
1427   /* Categorize all the options,
1428      and figure out which argv elts are option arguments.  */
1429   for (from = 1; from < argc; from++)
1430     {
1431       options[from] = -1;
1432       priority[from] = 0;
1433       if (argv[from][0] == '-')
1434         {
1435           int match, thislen;
1436           char *equals;
1437
1438           /* If we have found "--", don't consider
1439              any more arguments as options.  */
1440           if (argv[from][1] == '-' && argv[from][2] == 0)
1441             {
1442               /* Leave the "--", and everything following it, at the end.  */
1443               for (; from < argc; from++)
1444                 {
1445                   priority[from] = -100;
1446                   options[from] = -1;
1447                 }
1448               break;
1449             }
1450
1451           /* Look for a match with a known old-fashioned option.  */
1452           for (i = 0; i < sizeof (standard_args) / sizeof (standard_args[0]); i++)
1453             if (!strcmp (argv[from], standard_args[i].name))
1454               {
1455                 options[from] = standard_args[i].nargs;
1456                 priority[from] = standard_args[i].priority;
1457                 if (from + standard_args[i].nargs >= argc)
1458                   fatal ("Option `%s' requires an argument\n", argv[from]);
1459                 from += standard_args[i].nargs;
1460                 goto done;
1461               }
1462
1463           /* Look for a match with a known long option.
1464              MATCH is -1 if no match so far, -2 if two or more matches so far,
1465              >= 0 (the table index of the match) if just one match so far.  */
1466           if (argv[from][1] == '-')
1467             {
1468               match = -1;
1469               thislen = strlen (argv[from]);
1470               equals = index (argv[from], '=');
1471               if (equals != 0)
1472                 thislen = equals - argv[from];
1473
1474               for (i = 0;
1475                    i < sizeof (standard_args) / sizeof (standard_args[0]); i++)
1476                 if (standard_args[i].longname
1477                     && !strncmp (argv[from], standard_args[i].longname,
1478                                  thislen))
1479                   {
1480                     if (match == -1)
1481                       match = i;
1482                     else
1483                       match = -2;
1484                   }
1485
1486               /* If we found exactly one match, use that.  */
1487               if (match >= 0)
1488                 {
1489                   options[from] = standard_args[match].nargs;
1490                   priority[from] = standard_args[match].priority;
1491                   /* If --OPTION=VALUE syntax is used,
1492                      this option uses just one argv element.  */
1493                   if (equals != 0)
1494                     options[from] = 0;
1495                   if (from + options[from] >= argc)
1496                     fatal ("Option `%s' requires an argument\n", argv[from]);
1497                   from += options[from];
1498                 }
1499             }
1500         done: ;
1501         }
1502     }
1503
1504   /* Copy the arguments, in order of decreasing priority, to NEW.  */
1505   new[0] = argv[0];
1506   while (incoming_used < argc)
1507     {
1508       int best = -1;
1509       int best_priority = -9999;
1510
1511       /* Find the highest priority remaining option.
1512          If several have equal priority, take the first of them.  */
1513       for (from = 1; from < argc; from++)
1514         {
1515           if (argv[from] != 0 && priority[from] > best_priority)
1516             {
1517               best_priority = priority[from];
1518               best = from;
1519             }
1520           /* Skip option arguments--they are tied to the options.  */
1521           if (options[from] > 0)
1522             from += options[from];
1523         }
1524
1525       if (best < 0)
1526         abort ();
1527
1528       /* Copy the highest priority remaining option, with its args, to NEW.
1529          Unless it is a duplicate of the previous one.  */
1530       if (! (options[best] == 0
1531              && ! strcmp (new[to - 1], argv[best])))
1532         {
1533           new[to++] = argv[best];
1534           for (i = 0; i < options[best]; i++)
1535             new[to++] = argv[best + i + 1];
1536         }
1537
1538       incoming_used += 1 + (options[best] > 0 ? options[best] : 0);
1539
1540       /* Clear out this option in ARGV.  */
1541       argv[best] = 0;
1542       for (i = 0; i < options[best]; i++)
1543         argv[best + i + 1] = 0;
1544     }
1545
1546   /* If duplicate options were deleted, fill up extra space with null ptrs.  */
1547   while (to < argc)
1548     new[to++] = 0;
1549
1550   bcopy (new, argv, sizeof (char *) * argc);
1551
1552   free (options);
1553   free (new);
1554   free (priority);
1555 }
1556 \f
1557 DEFUN ("kill-emacs", Fkill_emacs, Skill_emacs, 0, 1, "P",
1558   "Exit the Emacs job and kill it.\n\
1559 If ARG is an integer, return ARG as the exit program code.\n\
1560 If ARG is a  string, stuff it as keyboard input.\n\n\
1561 The value of `kill-emacs-hook', if not void,\n\
1562 is a list of functions (of no args),\n\
1563 all of which are called before Emacs is actually killed.")
1564   (arg)
1565      Lisp_Object arg;
1566 {
1567   Lisp_Object hook, hook1;
1568   int i;
1569   struct gcpro gcpro1;
1570
1571   GCPRO1 (arg);
1572
1573   if (feof (stdin))
1574     arg = Qt;
1575
1576   if (!NILP (Vrun_hooks) && !noninteractive)
1577     call1 (Vrun_hooks, intern ("kill-emacs-hook"));
1578
1579   UNGCPRO;
1580
1581 /* Is it really necessary to do this deassign
1582    when we are going to exit anyway?  */
1583 /* #ifdef VMS
1584   stop_vms_input ();
1585  #endif  */
1586
1587   shut_down_emacs (0, 0, STRINGP (arg) ? arg : Qnil);
1588
1589   /* If we have an auto-save list file,
1590      kill it because we are exiting Emacs deliberately (not crashing).
1591      Do it after shut_down_emacs, which does an auto-save.  */
1592   if (STRINGP (Vauto_save_list_file_name))
1593     unlink (XSTRING (Vauto_save_list_file_name)->data);
1594
1595   exit (INTEGERP (arg) ? XINT (arg)
1596 #ifdef VMS
1597         : 1
1598 #else
1599         : 0
1600 #endif
1601         );
1602   /* NOTREACHED */
1603 }
1604
1605
1606 /* Perform an orderly shutdown of Emacs.  Autosave any modified
1607    buffers, kill any child processes, clean up the terminal modes (if
1608    we're in the foreground), and other stuff like that.  Don't perform
1609    any redisplay; this may be called when Emacs is shutting down in
1610    the background, or after its X connection has died.
1611
1612    If SIG is a signal number, print a message for it.
1613
1614    This is called by fatal signal handlers, X protocol error handlers,
1615    and Fkill_emacs.  */
1616
1617 void
1618 shut_down_emacs (sig, no_x, stuff)
1619      int sig, no_x;
1620      Lisp_Object stuff;
1621 {
1622   /* Prevent running of hooks from now on.  */
1623   Vrun_hooks = Qnil;
1624
1625   /* If we are controlling the terminal, reset terminal modes */
1626 #ifdef EMACS_HAVE_TTY_PGRP
1627   {
1628     int pgrp = EMACS_GETPGRP (0);
1629
1630     int tpgrp;
1631     if (EMACS_GET_TTY_PGRP (0, &tpgrp) != -1
1632         && tpgrp == pgrp)
1633       {
1634         fflush (stdout);
1635         reset_sys_modes ();
1636         if (sig && sig != SIGTERM)
1637           fprintf (stderr, "Fatal error (%d).", sig);
1638       }
1639   }
1640 #else
1641   fflush (stdout);
1642   reset_sys_modes ();
1643 #endif
1644
1645   stuff_buffered_input (stuff);
1646
1647   kill_buffer_processes (Qnil);
1648   Fdo_auto_save (Qt, Qnil);
1649
1650 #ifdef CLASH_DETECTION
1651   unlock_all_files ();
1652 #endif
1653
1654 #ifdef VMS
1655   kill_vms_processes ();
1656 #endif
1657
1658 #if 0 /* This triggers a bug in XCloseDisplay and is not needed.  */
1659 #ifdef HAVE_X_WINDOWS
1660   /* It's not safe to call intern here.  Maybe we are crashing.  */
1661   if (!noninteractive && SYMBOLP (Vwindow_system)
1662       && XSYMBOL (Vwindow_system)->name->size == 1
1663       && XSYMBOL (Vwindow_system)->name->data[0] == 'x'
1664       && ! no_x)
1665     Fx_close_current_connection ();
1666 #endif /* HAVE_X_WINDOWS */
1667 #endif
1668
1669 #ifdef SIGIO
1670   /* There is a tendency for a SIGIO signal to arrive within exit,
1671      and cause a SIGHUP because the input descriptor is already closed.  */
1672   unrequest_sigio ();
1673   signal (SIGIO, SIG_IGN);
1674 #endif
1675
1676 #ifdef WINDOWSNT
1677   term_ntproc ();
1678 #endif
1679
1680 #ifdef MSDOS
1681   dos_cleanup ();
1682 #endif
1683 }
1684
1685
1686 \f
1687 #ifndef CANNOT_DUMP
1688
1689 #ifdef HAVE_SHM
1690
1691 DEFUN ("dump-emacs-data", Fdump_emacs_data, Sdump_emacs_data, 1, 1, 0,
1692   "Dump current state of Emacs into data file FILENAME.\n\
1693 This function exists on systems that use HAVE_SHM.")
1694   (filename)
1695      Lisp_Object filename;
1696 {
1697   extern char my_edata[];
1698   Lisp_Object tem;
1699
1700   CHECK_STRING (filename, 0);
1701   filename = Fexpand_file_name (filename, Qnil);
1702
1703   tem = Vpurify_flag;
1704   Vpurify_flag = Qnil;
1705
1706   fflush (stdout);
1707   /* Tell malloc where start of impure now is */
1708   /* Also arrange for warnings when nearly out of space.  */
1709 #ifndef SYSTEM_MALLOC
1710   memory_warnings (my_edata, malloc_warning);
1711 #endif
1712   map_out_data (XSTRING (filename)->data);
1713
1714   Vpurify_flag = tem;
1715
1716   return Qnil;
1717 }
1718
1719 #else /* not HAVE_SHM */
1720
1721 DEFUN ("dump-emacs", Fdump_emacs, Sdump_emacs, 2, 2, 0,
1722   "Dump current state of Emacs into executable file FILENAME.\n\
1723 Take symbols from SYMFILE (presumably the file you executed to run Emacs).\n\
1724 This is used in the file `loadup.el' when building Emacs.\n\
1725 \n\
1726 You must run Emacs in batch mode in order to dump it.")
1727   (filename, symfile)
1728      Lisp_Object filename, symfile;
1729 {
1730   extern char my_edata[];
1731   Lisp_Object tem;
1732   Lisp_Object symbol;
1733   int count = specpdl_ptr - specpdl;
1734
1735   if (! noninteractive)
1736     error ("Dumping Emacs works only in batch mode");
1737
1738   /* Bind `command-line-processed' to nil before dumping,
1739      so that the dumped Emacs will process its command line
1740      and set up to work with X windows if appropriate.  */
1741   symbol = intern ("command-line-process");
1742   specbind (symbol, Qnil);
1743
1744   CHECK_STRING (filename, 0);
1745   filename = Fexpand_file_name (filename, Qnil);
1746   if (!NILP (symfile))
1747     {
1748       CHECK_STRING (symfile, 0);
1749       if (XSTRING (symfile)->size)
1750         symfile = Fexpand_file_name (symfile, Qnil);
1751     }
1752
1753   tem = Vpurify_flag;
1754   Vpurify_flag = Qnil;
1755
1756 #ifdef HAVE_TZSET
1757   set_time_zone_rule (dump_tz);
1758 #ifndef LOCALTIME_CACHE
1759   /* Force a tz reload, since set_time_zone_rule doesn't.  */
1760   tzset ();
1761 #endif
1762 #endif
1763
1764   fflush (stdout);
1765 #ifdef VMS
1766   mapout_data (XSTRING (filename)->data);
1767 #else
1768   /* Tell malloc where start of impure now is */
1769   /* Also arrange for warnings when nearly out of space.  */
1770 #ifndef SYSTEM_MALLOC
1771 #ifndef WINDOWSNT
1772   /* On Windows, this was done before dumping, and that once suffices.
1773      Meanwhile, my_edata is not valid on Windows.  */
1774   memory_warnings (my_edata, malloc_warning);
1775 #endif /* not WINDOWSNT */
1776 #endif
1777 #ifdef DOUG_LEA_MALLOC
1778   malloc_state_ptr = malloc_get_state ();
1779 #endif
1780   unexec (XSTRING (filename)->data,
1781           !NILP (symfile) ? XSTRING (symfile)->data : 0, my_edata, 0, 0);
1782 #ifdef DOUG_LEA_MALLOC
1783   free (malloc_state_ptr);
1784 #endif
1785 #endif /* not VMS */
1786
1787   Vpurify_flag = tem;
1788
1789   return unbind_to (count, Qnil);
1790 }
1791
1792 #endif /* not HAVE_SHM */
1793
1794 #endif /* not CANNOT_DUMP */
1795 \f
1796 #ifndef SEPCHAR
1797 #define SEPCHAR ':'
1798 #endif
1799
1800 Lisp_Object
1801 decode_env_path (evarname, defalt)
1802      char *evarname, *defalt;
1803 {
1804   register char *path, *p;
1805   Lisp_Object lpath, element, tem;
1806
1807   /* It's okay to use getenv here, because this function is only used
1808      to initialize variables when Emacs starts up, and isn't called
1809      after that.  */
1810   if (evarname != 0)
1811     path = (char *) getenv (evarname);
1812   else
1813     path = 0;
1814   if (!path)
1815     path = defalt;
1816 #ifdef DOS_NT
1817   /* Ensure values from the environment use the proper directory separator.  */
1818   if (path)
1819     {
1820       p = alloca (strlen (path) + 1);
1821       strcpy (p, path);
1822       path = p;
1823
1824       if ('/' == DIRECTORY_SEP)
1825         dostounix_filename (path);
1826       else
1827         unixtodos_filename (path);
1828     }
1829 #endif
1830   lpath = Qnil;
1831   while (1)
1832     {
1833       p = index (path, SEPCHAR);
1834       if (!p) p = path + strlen (path);
1835       element = (p - path ? make_string (path, p - path)
1836                  : build_string ("."));
1837
1838       /* Add /: to the front of the name
1839          if it would otherwise be treated as magic.  */
1840       tem = Ffind_file_name_handler (element, Qt);
1841       if (! NILP (tem))
1842         element = concat2 (build_string ("/:"), element);
1843
1844       lpath = Fcons (element, lpath);
1845       if (*p)
1846         path = p + 1;
1847       else
1848         break;
1849     }
1850   return Fnreverse (lpath);
1851 }
1852
1853 void
1854 syms_of_emacs ()
1855 {
1856   Qfile_name_handler_alist = intern ("file-name-handler-alist");
1857   staticpro (&Qfile_name_handler_alist);
1858
1859 #ifndef CANNOT_DUMP
1860 #ifdef HAVE_SHM
1861   defsubr (&Sdump_emacs_data);
1862 #else
1863   defsubr (&Sdump_emacs);
1864 #endif
1865 #endif
1866
1867   defsubr (&Skill_emacs);
1868
1869   defsubr (&Sinvocation_name);
1870   defsubr (&Sinvocation_directory);
1871
1872   DEFVAR_LISP ("command-line-args", &Vcommand_line_args,
1873     "Args passed by shell to Emacs, as a list of strings.");
1874
1875   DEFVAR_LISP ("system-type", &Vsystem_type,
1876     "Value is symbol indicating type of operating system you are using.");
1877   Vsystem_type = intern (SYSTEM_TYPE);
1878
1879   DEFVAR_LISP ("system-configuration", &Vsystem_configuration,
1880     "Value is string indicating configuration Emacs was built for.");
1881   Vsystem_configuration = build_string (EMACS_CONFIGURATION);
1882
1883   DEFVAR_LISP ("system-configuration-options", &Vsystem_configuration_options,
1884     "String containing the configuration options Emacs was built with.");
1885   Vsystem_configuration_options = build_string (EMACS_CONFIG_OPTIONS);
1886
1887   DEFVAR_BOOL ("noninteractive", &noninteractive1,
1888     "Non-nil means Emacs is running without interactive terminal.");
1889
1890   DEFVAR_LISP ("kill-emacs-hook", &Vkill_emacs_hook,
1891     "Hook to be run whenever kill-emacs is called.\n\
1892 Since kill-emacs may be invoked when the terminal is disconnected (or\n\
1893 in other similar situations), functions placed on this hook should not\n\
1894 expect to be able to interact with the user.  To ask for confirmation,\n\
1895 see `kill-emacs-query-functions' instead.");
1896   Vkill_emacs_hook = Qnil;
1897
1898 #ifdef SIGUSR1
1899   DEFVAR_LISP ("signal-USR1-hook", &Vsignal_USR1_hook,
1900     "Hook to be run whenever emacs receives a USR1 signal");
1901   Vsignal_USR1_hook = Qnil;
1902 #ifdef SIGUSR2
1903   DEFVAR_LISP ("signal-USR2-hook", &Vsignal_USR2_hook,
1904     "Hook to be run whenever emacs receives a USR2 signal");
1905   Vsignal_USR2_hook = Qnil;
1906 #endif
1907 #endif
1908
1909
1910   DEFVAR_INT ("emacs-priority", &emacs_priority,
1911     "Priority for Emacs to run at.\n\
1912 This value is effective only if set before Emacs is dumped,\n\
1913 and only if the Emacs executable is installed with setuid to permit\n\
1914 it to change priority.  (Emacs sets its uid back to the real uid.)\n\
1915 Currently, you need to define SET_EMACS_PRIORITY in `config.h'\n\
1916 before you compile Emacs, to enable the code for this feature.");
1917   emacs_priority = 0;
1918
1919   DEFVAR_LISP ("path-separator", &Vpath_separator,
1920     "The directory separator in search paths, as a string.");
1921   {
1922     char c = SEPCHAR;
1923     Vpath_separator = make_string (&c, 1);
1924   }
1925
1926   DEFVAR_LISP ("invocation-name", &Vinvocation_name,
1927     "The program name that was used to run Emacs.\n\
1928 Any directory names are omitted.");
1929
1930   DEFVAR_LISP ("invocation-directory", &Vinvocation_directory,
1931     "The directory in which the Emacs executable was found, to run it.\n\
1932 The value is nil if that directory's name is not known.");
1933
1934   DEFVAR_LISP ("installation-directory", &Vinstallation_directory,
1935     "A directory within which to look for the `lib-src' and `etc' directories.\n\
1936 This is non-nil when we can't find those directories in their standard\n\
1937 installed locations, but we can find them\n\
1938 near where the Emacs executable was found.");
1939   Vinstallation_directory = Qnil;
1940 }